WO2002090078A1 - Dispositif permettant de chauffer des composants de machines concues pour la transformation de resines ou de caoutchoucs synthetiques ou naturels - Google Patents

Dispositif permettant de chauffer des composants de machines concues pour la transformation de resines ou de caoutchoucs synthetiques ou naturels Download PDF

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Publication number
WO2002090078A1
WO2002090078A1 PCT/EP2002/003441 EP0203441W WO02090078A1 WO 2002090078 A1 WO2002090078 A1 WO 2002090078A1 EP 0203441 W EP0203441 W EP 0203441W WO 02090078 A1 WO02090078 A1 WO 02090078A1
Authority
WO
WIPO (PCT)
Prior art keywords
powders
machines
rubbers
heating
natural resins
Prior art date
Application number
PCT/EP2002/003441
Other languages
English (en)
Other versions
WO2002090078A8 (fr
Inventor
Albino Rossi
Original Assignee
Ferioli Filippo S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferioli Filippo S.P.A. filed Critical Ferioli Filippo S.P.A.
Priority to DE60223354T priority Critical patent/DE60223354T2/de
Priority to EP02727491A priority patent/EP1387748B1/fr
Publication of WO2002090078A1 publication Critical patent/WO2002090078A1/fr
Publication of WO2002090078A8 publication Critical patent/WO2002090078A8/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould

Definitions

  • the present invention relates to a device for heating components of machines for transforming synthetic or natural resins or rubbers.
  • Various types of source have been tried in transforming resins or rubbers with the purpose of transferring temperature to the molds, extrusion cylinders, et cetera.
  • the temperatures normally required are between approximately 80 °C and approximately 420 °C and the heat sources used are electric resistors, radiant lamps, steam and induction generators.
  • the main limitation of heat sources is their insufficient precision in uniformly distributing the temperature, because sources applied directly to the mechanical parts, molds, cylinders, et cetera, must generate higher temperatures and one does not obtain surfaces having uniform temperatures.
  • a fairly precise technique includes heating diathermic oil by means of resistors (in a separate machine) and pumping the oil into the molds. By using diathermic oil, one obtains good precision and uniformity of temperature, but the rising gradient is very slow and there is the limitation of conveying the oil in flexible hoses at a maximum possible temperature of 250 °C. Moreover, the cost of this application does not allow a widespread use.
  • Radiant lamps and induction generators can only heat perimetric surfaces and therefore radiation spreads from the outside of the parts to be heated, while the core remains colder.
  • Forming composite components with metals, reinforcement fibers, thermosetting resins such as for example boards for printed circuits, flexible flat electric resistors, et cetera, requires, in addition to the temperature for the reaction of the resins, a certain pressure and vacuum in order to evacuate the air and reaction gases.
  • the forming process further requires cooling for fixing and size calibration.
  • the machines (presses) used and produced so far provide three of the four functions required by the production cycle, i.e., heating with diathermic oil up to a maximum of 250 °C, pressure, and vacuum; however, in these presses cooling is impossible, because in the same press the plates containing oil and the external central unit to be cooled would require extremely long times. Accordingly, in presses of this kind the method is ended by removing the vacuum and pressure and transferring the components to another press with cooled plates.
  • the aim of the present invention is to provide a device for heating components of machines for transforming synthetic or natural resins or rubbers which overcomes the drawbacks of the cited prior art.
  • An object of the invention is to provide a device which is adapted to be applied to a wide variety of machines and for different purposes.
  • Another object is to provide a device which is adapted to provide a uniform temperature in components of machines heated by means of electric resistors.
  • Figure 1 is a schematic partial perspective view of a component of a machine for transforming synthetic or natural resins or rubbers, provided with the heating device according to the invention
  • Figure 2 is a partial cutout perspective view of the heating device according o the invention
  • Figure 3 is a plan view of the machine component of Figure 1.
  • the heating device can be applied to a component of a machine for transforming synthetic or natural resins or rubbers, which in the illustrated example is constituted by a plate 2 which includes a plurality of heating devices 1 alternated with a plurality of tubes 3 for the passage of cooling fluid.
  • the heating device 1 comprises a heating member, in the specific case an elongated electric resistor 4, which is embedded in the body of the plate 2 with an interposed layer of powder 5.
  • the purpose of the layer of powder 5 is to constitute a thermal buffer which prevents direct contact between the heating member and the body 2.
  • the heating member is preferably constituted by an electric resistor, and the thermal buffer 5 can be constituted, according to the invention, by metallic powders and/or metallic oxide powders and/or metal-ceramic powders and/or by refractory powders.
  • the powders prevent the violent transfer of temperatures from the electric resistors 4 to the components to be heated.
  • the shapes of the powders can vary in terms of particle size distribution and geometric shape.
  • the powders can be spherical, needle- shaped, aggregate, porous, et cetera.
  • the cladding of the resistors that make contact with the machine components can be coated by metallization technology.
  • a device for heating components of machines for transforming synthetic or natural resins or rubbers having been provided which is capable of obtaining a uniform temperature in machine components with electric resistors by means of a thermal buffer interposed between the heating members and the machine component.
  • the materials used, as well as the dimensions, may of course be any according to requirements and to the state of the art.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

La présente invention se rapporte à un dispositif permettant de chauffer des composants de machines conçues pour la transformation de résines ou de caoutchoucs synthétiques ou naturels. Ce dispositif comporte une poudre qui est introduite entre un élément chauffant intégré à un composant de machine devant être chauffé et le corps dudit composant, de manière à constituer un tampon thermique destiné à empêcher le contact direct entre l'élément chauffant et le composant de la machine ce qui permet d'obtenir une température uniforme dans le composant.
PCT/EP2002/003441 2001-05-09 2002-03-27 Dispositif permettant de chauffer des composants de machines concues pour la transformation de resines ou de caoutchoucs synthetiques ou naturels WO2002090078A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE60223354T DE60223354T2 (de) 2001-05-09 2002-03-27 Vorrichtung zum erhitzen von maschinenelementen zur verarbeitung von synthetischen- oder natur- harzen oder kautschuken
EP02727491A EP1387748B1 (fr) 2001-05-09 2002-03-27 Dispositif permettant de chauffer des composants de machines concues pour la transformation de resines ou de caoutchoucs synthetiques ou naturels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001MI000947A ITMI20010947A1 (it) 2001-05-09 2001-05-09 Dispositivo per il riscaldamento di componenti di macchine per la trasformazione di resine o gomme sintetiche o naturali
ITMI2001A000947 2001-05-09

Publications (2)

Publication Number Publication Date
WO2002090078A1 true WO2002090078A1 (fr) 2002-11-14
WO2002090078A8 WO2002090078A8 (fr) 2003-03-06

Family

ID=11447617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/003441 WO2002090078A1 (fr) 2001-05-09 2002-03-27 Dispositif permettant de chauffer des composants de machines concues pour la transformation de resines ou de caoutchoucs synthetiques ou naturels

Country Status (7)

Country Link
EP (1) EP1387748B1 (fr)
AT (1) ATE377497T1 (fr)
DE (1) DE60223354T2 (fr)
ES (1) ES2295338T3 (fr)
IT (1) ITMI20010947A1 (fr)
TW (1) TW553816B (fr)
WO (1) WO2002090078A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287320A (en) * 1940-08-21 1942-06-23 Byron V Mitchell Vulcanizing implement
GB1305102A (fr) * 1970-03-06 1973-01-31
DE2819992A1 (de) * 1978-05-08 1979-11-15 Tuerk & Hillinger Kg Elektrischer schutzwiderstand fuer schienenfahrzeuge
US4246226A (en) * 1979-12-07 1981-01-20 Macmillan Kenneth T Method of and apparatus for utilizing dry heated pulverulent material to cure a tire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287320A (en) * 1940-08-21 1942-06-23 Byron V Mitchell Vulcanizing implement
GB1305102A (fr) * 1970-03-06 1973-01-31
DE2819992A1 (de) * 1978-05-08 1979-11-15 Tuerk & Hillinger Kg Elektrischer schutzwiderstand fuer schienenfahrzeuge
US4246226A (en) * 1979-12-07 1981-01-20 Macmillan Kenneth T Method of and apparatus for utilizing dry heated pulverulent material to cure a tire

Also Published As

Publication number Publication date
DE60223354T2 (de) 2008-09-04
WO2002090078A8 (fr) 2003-03-06
ES2295338T3 (es) 2008-04-16
DE60223354D1 (de) 2007-12-20
ATE377497T1 (de) 2007-11-15
ITMI20010947A0 (it) 2001-05-09
EP1387748B1 (fr) 2007-11-07
TW553816B (en) 2003-09-21
ITMI20010947A1 (it) 2002-11-09
EP1387748A1 (fr) 2004-02-11

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